From mboxrd@z Thu Jan 1 00:00:00 1970 From: thunder7@xs4all.nl Subject: Re: raid5 performance question Date: Wed, 8 Mar 2006 07:45:10 +0100 Message-ID: <20060308064510.GA1561@amd64.of.nowhere> References: <5d96567b0603060346r768a0ee1i8d8170cf9ba4bac1@mail.gmail.com> <17420.46746.365629.168649@cse.unsw.edu.au> Reply-To: Jurriaan Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <17420.46746.365629.168649@cse.unsw.edu.au> Sender: linux-raid-owner@vger.kernel.org To: Linux RAID Mailing List List-Id: linux-raid.ids From: Neil Brown Date: Tue, Mar 07, 2006 at 09:24:26AM +1100 > You can also try increasing the size of the stripe cache in > /sys/block/mdX/md/stripe_cache_size > > The units are in pages (normally 4K) per device. The default is 256 which fits > only one stripe with a 1 Meg chunk size. > > Try 1024 ? > Interesting. I noticed I don't have such a file for my raid6 device. Can you explain why? I thought raid6 and raid5 worked a lot like each other. Thanks, Jurriaan -- So I must behave with haste and dishonor to serve the political ambitions of men that I never vowed, before the Lord, to serve and honor. I must be pretty and delicate and happy and perfect; I must accord his passing no mourning, and no loss. Michelle West - The Broken Crown Debian (Unstable) GNU/Linux 2.6.16-rc5-mm2 5503 bogomips load 0.06